There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

Using eight eights and addition only, can you make 1000?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

The more it dries, the wetter it becomes. Can you tell what it is?

What is the fastest way to double your money?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?